中华人民共和国国家标准
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 1989-1980
Methods for indication of the 7-bit encoding character set for information processing switching on 12.7 mm magnetic tape 信息处理交换用七位编码字符集在9磁道12.7 毫米磁带上的表示方法
Issued Date:1980-07-10
Implemented Date:1980-12-01
Issued by:
The Standardization Administration of the People's Republic of China